Medications might also cause a drop in blood pressure. Beta-blockers and nitroglycerin, used to treat heart disease, are common culprits. Diuretics, tricyclic antidepressants, and erectile dysfunction drugs can also cause hypotension. Some people have low blood pressure for unknown reasons.
Theoretically, then, the President can probably pardon him/her-self for any Federal crime â but this only prevents actual prosecution for that crime, not impeachment for the crime itself. Prior Answer, to the hypothetical of the VP murdering the President and then pardoning himself:
That is an interesting theory, I've never really thought of it that way. But the Presidential Pardon is a tool the President can use when he feels there has been a miscarriage of justice. There have been pardons in the past (many of which) that have been used for political purposes, and that is wrong. However, I do believe that the President should have the authority to pardon a person for a crime. It is important to note that the President can only pardon people for Federal crimes. He cannot pardon someone charged with a state crime, only the governor of that state can do that.